I'm Having A Tingling/numbing Sensation On The Right Side Of

i'm having a tingling/numbing sensation on the right side of my neck around the ear, radiating down to my shoulder. My doctor says it's a pinched nerve or stress, and I've had a ultrasound of the carotids which came back negative. I requested a cat scan of the brain which will be tuesday. Of course I'm afraid I may have a life threatening disease. Does that sound like anything you have come across? I don't know what to think of it.